Contact fatigue behavior of PVD-coated hardmetals

Tarrés, E.; Ramírez, G.; Gaillard, Yves; Jiménez‐Piqué, E.; Llanes, L.

doi:10.1016/j.ijrmhm.2008.05.003

Cited by 62 publications

(35 citation statements)

References 42 publications

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“…(Authors) R2 is completely right about the relevance of coating composition on the contact damage response of coated hardmetals. Indeed, it has been the main topic addressed by UPC's research group in recent papers (References [40], [43] and [44]), and interested readers may get further information on this issue there. However, the variable experimentally studied in this investigation was "substrate surface finish", while the coatings' features were kept unchanged.…”

Section: (R1) It Is Not Clear Why the Effect Of The Co Binder In The mentioning

confidence: 99%

“…Recently it has also been applied to introduce controlled damage in cemented carbides [39] as well as in coated hardmetals and tool steels [40][41][42][43][44]. The main reason for the popularity of this technique is the fact that a spherical indenter delivers concentrated stresses over a small area of the specimen surface, such that typical "blunt" service-like conditions are simulated and damage evolution associated with increasing load can be examined.…”

Section: Evaluation Of Contact Damage Resistancementioning

confidence: 99%

“…Refs. [45,46]), although here extended to coated systems [40,41]. It is schematically outlined in Figure 1, and may be described as follows: (1) a TiN-coated hardmetal specimen (with a given substrate surface finish) is transversally cut to obtain two rectangular pieces; (2) the two parts are attached tightly and put into a mould of bakelite, with the coated sides facing each other, and the ensuing surface, perpendicular to the substrate -coating / coating -substrate interfaces, is ground and polished; (3) the attained mould is then broken mechanically and, once more, the two halves are put into another mould of bakelite with the newly polished surfaces clamped face to face; (4) the coated surface is indented symmetrically across the surface trace on the interface; and finally, (5) the two parts are taken out mechanically again and indentation halfsurfaces and cross sections are finally examined using FESEM.…”

Section: Evaluation Of Contact Damage Resistancementioning

confidence: 99%

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Contact damage resistance of TiN-coated hardmetals: Beneficial effects associated with substrate grinding

Yang

Marro

Trifonov

et al. 2015

Surface and Coatings Technology

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Contact loading is a common service condition for coated hardmetal tools and components. Substrate grinding represents a key step within the manufacturing chain of these coated systems. Within this context, the influence of surface integrity changes caused by abrasive grinding of the hardmetal substrate, prior to coating, is evaluated with respect to contact damage resistance. Three different substrate surface finish conditions are studied: ground (G), mirror-like polished (P) and ground plus heat-treated (GTT). Tests are conducted by means of spherical indentation under increasing monotonic load and the contact damage resistance is assessed. Substrate grinding enhances resistance against both crack nucleation at the coating surface and subsequent propagation into the hardmetal substrate. Hence, crack emergence and damage evolution is effectively delayed for the coated G condition, as compared to the reference P one. The observed system response is discussed on the basis of the beneficial effects associated with compressive residual stresses remnant at the subsurface level after grinding, ion-etching, and coating. The influence of the stress state is further corroborated by a lower resistance against damage for the coated GTT specimens. Finally, it is proposed and preliminary validated that substrate grinding also enhances damage tolerance of the coated system when exposed to contact loads. M.P. Johansson-Jõesaar and L. LlanesDear Professor Matthews, Please find attached electronic files corresponding to our contribution on contact damage resistance of TiN-coated hardmetals: beneficial effects associated with substrate grinding, which we (all authors do agree to the submission of the manuscript) offer for publication in Surface and Coatings Technology.I hope it is found satisfactory. (Procedia CIRP, Volume 13, 2014, Pages 257-263).(Authors) R1 is right about connection between results published in our contribution to the 2nd CIRP Conference on Surface Integrity (reference [27] in the submitted manuscript) and those presented in this paper. However, the two papers are distinctly different and cover completely different research topics and contain different data. The former focuses on "ground hardmetals" and "flexural strength/fractography", whereas the current one deals with "coated hardmetals" and "contact damage". Hence, we find R1's comment regarding "similar results" inappropriate. (Authors) Co binder effects on residual stresses are not neglected, and our writing may be blamed for such misunderstanding. Residual stresses induced by grinding are "macrostresses" evaluated in the WC phase and assumed to be representative of the whole WC-Co composite. They are different from the "microstresses" (different for each individual phase) that arise due to the difference in thermal expansion between the binder and the carbide as the material cools from liquid-or solid-phase sintering. In cemented carbides with WC as the carbide, the WC is taken as a reliable reference phase because it remains stoichiometric...

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Section: (R1) It Is Not Clear Why the Effect Of The Co Binder In The mentioning

confidence: 99%

Section: Evaluation Of Contact Damage Resistancementioning

confidence: 99%

Section: Evaluation Of Contact Damage Resistancementioning

confidence: 99%

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Contact damage resistance of TiN-coated hardmetals: Beneficial effects associated with substrate grinding

Yang

Marro

Trifonov

et al. 2015

Surface and Coatings Technology

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“…An even more intricate problem is the long-term fatigue behavior under sustained loading conditions below the yield strength under single, instantaneous loading conditions. As conventional experimental testing and subsequent analysis designed for fatigue experiments of bulk materials are not applicable as (i) the maximum load should be within the modified surface layer and (ii) the typical lengthscale is less than 100 nm (28)(29)(30)(31) .…”

Section: Introductionmentioning

confidence: 99%

Effects of plasma immersion ion implantation on fatigue properties of titanium alloy surfaces

Souza

Fernandes²,

Mändl³

et al. 2018

RBAV

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“…Unlike different rolling schemes (no-slip rolling, rolling with constant slip, etc.) (Ref 14-17 and references therein), there are not so many published works discussing cyclic strength of materials under pulsating non-impact contact load ( Ref 13,[18][19][20][21] and there are only single data about the cyclic loading of NiCrBSi coatings according to the specified scheme ( Ref 22). In the meantime, the given scheme of contact-fatigue tests may be effective for evaluation of contact endurance of materials after various surface-related and strengthening treatments.…”

Section: Introductionmentioning

confidence: 99%

The Behavior of Gas Powder Laser Clad NiCrBSi Coatings Under Contact Loading

Savrai

Makarov

Соболева

et al. 2016

J. of Materi Eng and Perform

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The behavior of NiCrBSi coatings obtained by laser cladding from powders with various chromium, carbon and boron contents has been investigated under contact loading through microindentation using a Vickers indenter and via non-impact cyclic loading as per ''sphere-to-surface'' contact scheme. The phase composition of the coating containing 0.48% C, 14.8% Cr, 2.1% B is c + Ni 3 B + Cr 23 C 6 and that of the coating containing 0.92% C, 18.2% Cr, 3.3% B is c + Ni 3 B + Cr 7 C 3 + CrB. The established restrictions of the processes of plastic deformation and cracking for the more heavily alloyed and harder coating under contact fatigue loading are substantially due to its increased ability to deform predominantly in the elastic region under the used cyclic loading conditions. This is indicated by the obtained microindentation data and, therefore, the microindentation method (one-time indentation) can be used to assess the ability of the laser clad NiCrBSi coatings to withstand repeated contact loads.

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Contact fatigue behavior of PVD-coated hardmetals

Cited by 62 publications

References 42 publications

Contact damage resistance of TiN-coated hardmetals: Beneficial effects associated with substrate grinding

Contact damage resistance of TiN-coated hardmetals: Beneficial effects associated with substrate grinding

Effects of plasma immersion ion implantation on fatigue properties of titanium alloy surfaces

The Behavior of Gas Powder Laser Clad NiCrBSi Coatings Under Contact Loading

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